<!DOCTYPE html>
<style>
::-webkit-scrollbar { display: none; }
</style>
Tests scroll offset of contents with subsequence caching. Passes if no red.
<div id="container" style="position: absolute; width: 300px; height: 200px; overflow: scroll">
  <div id="content1" style="position: absolute; top: 0; left: 0; width: 100px; height: 400px; background-color: green"></div>
</div>
<script>
container.scrollTop = 150;
</script>
